Sapphire is the birthstone for September - a beautiful precious gemstone that comes in a variety of colors, however it is the deep blue that is most associated with September.
The sapphire is an incredibly durable stone, made up of corundum with elements of titanium. It is one of the hardest substances after diamond, hence the use of sapphire glass in expensive watches that makes them scratch resistant.
Princess Diana of Wales famously had a love for sapphires, with her engagement ring being one of the most iconic pieces of jewellery in modern history. Sapphires have always been a desire of royalty and wealthy aristocrats through history. Helen of Troy was thought to have owned a large star Sapphire which many believe was the key to her allurement.